Harpster Articles

  • Retrofit decreases dissolved oxygen at low load

    Teresa Hansen, Section Editor Entergy’s Little Gypsy Unit 2 is a 450 MW gas-fired (with an oil alternative) thermal power plant originally designed for base load operation. Since changing over to peaking power operation, the plant has had problems with excessive dissolved oxygen (DO), especially during periods of low load. Entergy hired Intek Inc. to use a nontraditional ...


    By Intek, Inc.

  • A connection between cycle chemistry & condenser configuration

    Abstract The most important contributor to power plant chemistry upset conditions and to the overall plant thermal efficiency is the condenser. In-leakage into the subatmospheric pressure, or shell side, of this important balance-of-plant component is responsible for most system wide corrosion, loss of availability and loss of heat transfer in boiler tubes due to deposition of ...


    By Intek, Inc.

  • A voyage on the seven c`s - phase II common cause correction of a condenser`s conduct & condensate chemistry

    Abstract Experiences in power plant chemistry has moved beyond understanding chemical reactions, controlling reaction rate or preventing reactions from occurring. Today, emphasis is placed on root cause analysis that demands a holistic approach employing multidisciplinary problem solving methods. This may be accomplished through a team effort or the chemist becoming more aware of ...


    By Intek, Inc.

  • Condenser performance monitoring, control and optimization

    Abstract During the past sixteen years, understanding of the condensation process within condensers has been advanced through the introduction of new monitoring and control instrumentation. Data gathered from a variety of condenser types employing these instruments have allowed comprehension of the condensation process to be advanced to the point where underperforming regions of tube ...


    By Intek, Inc.

  • Instrumentation, methods & analysis tools for comprehensive condenser testing, monitoring & troubleshooting

    Abstract Proper monitoring philosophy in combination with available, accurate and reliable instrumentation for comprehensive condenser performance testing, monitoring and troubleshooting is presented. Practical engineering guidance resulting from the use of advanced instrumentation with proven utility has contributed to the identification of new beneficial performance indicators. ...


    By Intek, Inc.

  • Unveiling root causes of chemistry and performance problems by putting condensers under a microscope

    Abstract The results obtained from Condenser Monitoring Systems installed at multiple operating units are presented. The Condenser Monitoring System is comprised of unique measurement instruments that eliminate the need to make several assumptions necessary to measure condenser performance for comparison with design predictions. These direct comparisons unveil root cause issues ...


    By Intek, Inc.

  • Increasing condenser capacity without adding tubes to support a station uprate

    Abstract A station uprate provides an economical opportunity to improve the generation capacity of a power plant if all the major system components are able to handle the effects of increased generation. The magnitude of uprate from increased steam generation will be limited by the maximum capacity of the weakest link in the cycle, which for many plants is the condenser. The condensers ...


    By Intek, Inc.

  • Performance monitoring & troubleshooting with a new individual condenser tube circulating water flow and fouling (ClA/FF) meter - case study

    Introduction Midwest Generation Joliet Station in Illinois has two coal-fired units, Unit 7 and Unit 8. Roth 550 MW units are located on the Des Plaines River and have been in operation since 1963-1964. The circulating water system is a once-through system comprised of a bar rack, traveling screens, circulating water pumps and reversible condensers. The original condenser tubes on Unit ...


    By Intek, Inc.

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